LT1111IS8

Overview

The LT1111IS8 is a micropower DC/DC converter from Analog Devices, housed in an 8-SOIC package. It supports both buck and boost topologies with a switching frequency of 72 kHz. The device accepts an input voltage range from 2 V to 30 V and provides a single adjustable output starting at 1.25 V, capable of reaching up to 50 V. It delivers a switch current of 1.5 A and operates within a temperature range of -40°C to +105°C. The quiescent current is specified at 300 uA.

Feature Summary

• Supports buck and boost conversion topologies for flexible voltage regulation
• Provides adjustable output voltage ranging from 1.25 V to 50 V
• Operates with high efficiency under varying load conditions
• Features low quiescent current for power-sensitive applications

Applications

• Battery-powered portable electronics requiring efficient voltage step-up or step-down
• Industrial control systems needing isolated or non-isolated DC-DC conversion
• Embedded systems utilizing microcontrollers with wide input voltage ranges
• Communication equipment requiring stable power supply from variable sources

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and check for specific ordering suffixes that may affect packaging or pinout. Review the latest datasheet revision for any design-in updates. Ensure storage and handling procedures meet industry standards for surface-mount devices to prevent damage during assembly.

Selection Notes

Evaluate input voltage range against source availability to ensure operation within the 2 V to 30 V limits. Consider thermal management requirements given the 8-SOIC package and operating temperature range. Assess output current needs against the 1.5 A switch current capability. Compare alternative parts if higher efficiency or different package types are required for space-constrained designs.

Part Context

The LT1111 series represents Analog Devices' solution for micropower switching regulators. This specific model integrates control logic and power switches into a compact SOIC package. It is part of a broader family designed for applications where size and power consumption are critical constraints. The device simplifies design by combining essential functions into a single chip.

Replacement Considerations

LT1111IS8#PBF is listed as a parameter-equivalent alternative.